from QQLoginTool.QQtool import OAuthQQ
from django.shortcuts import render
from rest_framework.generics import GenericAPIView
from rest_framework.response import Response
from rest_framework.views import APIView
from django.conf import settings

from carts.utils import merge_cookie_redis_cart
from . import serializers
from oauth.utils import generate_sign_openid
from .models import OAuthQQUser


class OAuthQQLoginView(APIView):
    def get(self, request):
        # 1.获取参数
        state = request.query_params.get("state", "/")

        # 2.创建qq对象
        oauth_qq = OAuthQQ(client_id=settings.QQ_CLIENT_ID,
                client_secret=settings.QQ_CLIENT_SECRET,
                redirect_uri=settings.QQ_REDIRECT_URI,
                state=state)

        # 3.返回qq登陆页面
        login_url = oauth_qq.get_qq_url()
        return Response({"auth_url": login_url})


class OAuthQQUserView(GenericAPIView):
    serializer_class = serializers.OAuthQQUserSerializer

    def get(self, request):
        # 1.获取参数code，校验
        code = request.query_params.get("code")
        if not code:
            return Response("code丢失了")

        # 2.根据code获取access_token
        oauth_qq = OAuthQQ(client_id=settings.QQ_CLIENT_ID,
                           client_secret=settings.QQ_CLIENT_SECRET,
                           redirect_uri=settings.QQ_REDIRECT_URI,
                           state="/")
        access_token = oauth_qq.get_access_token(code)

        # 3.根据access_token获取openid
        openid = oauth_qq.get_open_id(access_token)

        # 4.通过openid查询qq对象用户
        try:
            oauth_qq_user = OAuthQQUser.objects.get(openid=openid)
        except OAuthQQUser.DoesNotExist:
            # 4.1初次授权
            sign_openid = generate_sign_openid(openid=openid)
            return Response({"access_token": sign_openid})
        else:
            # 5.1非初次授权
            user = oauth_qq_user.user

            from rest_framework_jwt.settings import api_settings
            jwt_payload_handler = api_settings.JWT_PAYLOAD_HANDLER
            jwt_encode_handler = api_settings.JWT_ENCODE_HANDLER
            payload = jwt_payload_handler(user)
            token = jwt_encode_handler(payload)

            # print(openid)

            # 合并购物车, 返回
            response = Response({
                "token": token,
                "username": user.username,
                "user_id": user.id
            })

            response = merge_cookie_redis_cart(request, user, response)

            return response

    def post(self, request):
        # 1.获取参数
        dict_data = request.data

        # 2.创建序列化器
        serializer = self.get_serializer(data = dict_data)

        # 3.校验，入库
        serializer.is_valid(raise_exception=True)
        user = serializer.save()

        # 3.1根据用户数据，生成token
        from rest_framework_jwt.settings import api_settings
        jwt_payload_handler = api_settings.JWT_PAYLOAD_HANDLER
        jwt_encode_handler = api_settings.JWT_ENCODE_HANDLER
        payload = jwt_payload_handler(user)
        token = jwt_encode_handler(payload)

        # 合并购物车, 返回
        response = Response({
            "token": token,
            "username": user.username,
            "user_id": user.id
        })

        response = merge_cookie_redis_cart(request, user, response)

        return response




